The Rays need a spot starter for Sunday because of Thursday’s doubleheader against the Twins.

McGee, 24, made the Rays out of spring training, but posted a 5.84 ERA and 2/3 K/BB ratio over his first seven innings. While he’s still considered the closer of the future in many circles, Rays manager Joe Maddon told J.B. Long of Bright House Sports Network that he wants the young left-hander to get more work in the minor leagues.

Cobb, a 23-year-old right-hander, has a 3.10 ERA over parts of six seasons in the minors, averaging 7.8 K/9 and 2.6 BB/9. The former 2006 fourth-round pick has a 2.05 ERA and 29/6 K/BB ratio over his first four starts with Triple-A Durham this season. He was ranked as the organization’s No. 16 prospect by Baseball America over the winter.

His first taste of the big leagues is expected to be a brief one, as Cobb will be sent back to the minors following Sunday’s outing. Topkin writes that right-hander Brandon Gomes, who was acquired from the Padres in the Jason Bartlett trade, is a “strong candidate” to join the Rays’ bullpen.